Sierraceratops (meaning "Sierra horned face") is a genus of chasmosaurine ceratopsian from the Late Cretaceous Hall Lake Formation of New Mexico, United States.

[1] In 1997, geologist Gregory H. Mack discovered fossils of a large horned dinosaur on the Armendaris ranch of Ted Turner, founder of CNN, near Truth or Consequences in Sierra County, New Mexico.

A team of the New Mexico Museum of Natural History and Science subsequently uncovered more bones with the cooperation of the ranch manager, Tom Wadell.

[1] In 2021, the type species Sierraceratops turneri was named and described by Sebastian G. Dalman, Spencer G. Lucas, Steven E. Jasinski, and Nicholas R. Longrich; the final article version was published in 2022.

[1] Phylogenetic analysis by Dalman et al. recovered Sierraceratops as a sister species to Bravoceratops and Coahuilaceratops, part of a group endemic to the southwestern United States and Mexico.